Ligand modulation of active center to promote lead-free Cs2AgInCl6 photocatalytic CO2 reduction

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外文摘要：Metal halide perovskites(MHP)are potential candidates for the photocatalytic reduction of CO2 due to their long photogenerated carrier lifetime and charge diffusion length.However,the conventional long-chain ligand impedes the adsorption and activation of CO2 molecules in practical applications.Here,a ligand modulation technology is employed to enhance the photocatalytic CO2 reduction activity of lead-free Cs2AgInCl6 microcrystals(MCs).The Cs2AgInCl6 MCs passivated by Oleic acid(OLA)and Octanoic acid(OCA)are used for photocatalytic CO2 reduction.The results show that the surface defects and electronic properties of Cs2AglnCl6 MCs can be adjusted through ligand modulation.Compared with the OLA-Cs2AgInCl6,the OCA-Cs2AgInCl6 catalyst demonstrated a significant improvement in the catalytic yield of CO and CH4.The CO and CH4 catalytic yields of OCA-Cs2AgInCl6 reached 171.88 and 34.15 μmol g-1 h-1 which were 2.03 and 12.98 times higher than those of OLA-Cs2AgInCl6,and the total electron consumption rate of OCA-Cs2AgInCl6 was 615.2 μmol g-1 h-1 which was 3.25 times higher than that of OLA-Cs2AgInCl6.Furthermore,in situ diffuse reflectance infrared Fourier transform spectra revealed the enhancement of photocatalytic activity in Cs2AgInCl6 MCs induced by ligand modulation.This study illustrates the potential of lead-free Cs2AgInCl6 MCs for efficient photocatalytic CO2 reduction and provides a ligand modulation strategy for the active promotion of MHP photocatalysts.

外文关键词：

Surface ligandPhotocatalysis CO2 reductionLead-free perovskiteReactive mechanism

作者：

Baofei Sun、Wei Chen、Yanyi Huang、Daofu Wu、Heng Luo、Faguang Kuang、Hongmei Ran、Yichen Liu、Liqin Gao、Jinchen Zhou、Bo Gao、Qiang Huang、Xiaosheng Tang

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作者单位：

Key Laboratory of Human Brain Bank for Functions and Diseases of Department of Education of Guizhou Province,College of Basic Medical,Guizhou Medical University,Guiyang 550025,Guizhou,China

College of Optoelectronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China

School of Electromechanical and Automotive Engineering,Yantai University,Yantai 264005,Shandong,China

State Key Laboratory of Catalysis,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,Liaoning,China

School of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,Henan,China

Key Laboratory of Optoelectronic Technology & Systems(Ministry of Education),College of Optoelectronic Engineering,Chongqing University,Chongqing 400044,China

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基金：

National Natural Science Foundation of ChinaNatural Science Foundation of ChongqingOpen Fund of the State Key Laboratory of High Field Laser Physics(Shanghai Institute of Optics and Fine Mechanics)China Postdoctoral Science FoundationDepartment of Education of Guizhou ProvinceDepartment of Education of Guizhou Province

项目编号：

62375032CSTB2023TIAD-KPX0017BX20230355Guizhou TeachingTechnology[2023]015

出版年：

2024

DOI：

10.1016/j.jechem.2024.04.021

能源化学

中国科学院大连化学物理研究所中国科学院成都有机化学研究所

能源化学

CSTPCDEI

影响因子：0.654

ISSN：2095-4956

年,卷(期)：2024.95(8)